Animals ordered to rest (6)
I believe the answer is:
otters
'animals' is the definition.
The answer is an example.
'ordered to rest' is the wordplay.
'ordered' indicates an anagram.
'to'+'rest'='torest'
'torest' is an anagram of 'OTTERS'.
(Other definitions for otters that I've seen before include "Aquatic carnivores" , "Water animals with webbed feet and flat tails" , "web-footed creatures" , "Water animals with webbed feet and brown fur" , "Fish-eating mammals" .)